I have learned some things from this thread, but some things about it are driving me crazy!
If the background is WAY out of focus, and you can't see any details at all, you can't say whether the lens has good bokeh or bad. A number of pictures posted here seem to fall in that category, in my simple-minded opinion. They have very nice diffused backgrounds, but don't tell you anything about bokeh. However, if background details, though out of focus, have an annoying edge to them, you can say both that the image illustrates bad bokeh and the lens has bad bokeh.
So, I think, in some cases, people have been using the term faddishly and trying to stretch it to cover cases that aren't instructive at all.
< end of old grump's rant>